How many copies did FPS Chess sell?

An estimated 1.0M to 1.7M copies, based on its 43k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did FPS Chess make?

FPS Chess is free to play, so there is no copy-sales revenue to estimate.

How big is FPS Chess?

Estimated owners: ≈ 1.0M–1.7M; from 43k reviews (Very Positive)

A labeled estimate from the public review count (adjusted for release year), not exact sales. Owner data cross-checked with SteamSpy.

Does this actually work?

We left FPS Chess out and predicted the genre from its 8 similar games. Every figure here, including FPS Chess's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 40.5M–77.6M

best case 662.3M (Counter-Strike 2)

The Multiplayer lane

A big, proven genre, though hit-driven: most sell around 53.6M copies, while a few break out far above.

A typical game

≈ 53.6M copies

≈ $589.3M after Steam's cut

from ~1.2M reviews

Best case

≈ 662.3M copies

Counter-Strike 2

from 9.7M reviews

A breakout hit, far above a typical game.

6 of your 8 games sit in the typical range; 2 are breakout hits far above it.

Copies and revenue are rough lifetime estimates from the review count; typical figures are medians per column, so they can come from different games.

The lane you'd be entering

Winners here lead with Shooter + Multiplayer, priced around $25.
The breakout hits carry Action + Shooter + FPS; a typical game here doesn't.
The games you compared span 2006 to 2020, a lane with a long track record.
A typical game here lands in Diamond ($1M+ before Steam's cut, est.). Tiers: Chris Zukowski's benchmark tiers.

Similar games

Game	Price	Reviews	Tags	Est. copies	Est. revenue
PUBG: BATTLEGROUNDS 2017	Est. copies ≈ 93.9M–152.6M 2.4x vs typical SteamSpy 100M–200M	Est. revenue Free	Free	2.7M reviews Mixed	SurvivalShooter +6
Tom Clancy's Rainbow Six Siege 2015	Est. copies ≈ 70.9M–115.3M SteamSpy 20M–50M	Est. revenue Free	Free	1.5M reviews Very Positive	FPSPvP +6
Counter-Strike 2 2012	Est. copies ≈ 504.6M–820.0M 8.4x vs typical SteamSpy 100M–200M	Est. revenue Free	Free	9.7M reviews Very Positive	FPSShooter +6
Apex Legends™ 2020	Est. copies ≈ 27.9M–45.3M SteamSpy 100M–200M	Est. revenue Free	Free	1.1M reviews Mixed	Free to PlayBattle Royale +6
Destiny 2 2019	Est. copies ≈ 19.0M–30.8M SteamSpy 20M–50M	Est. revenue Free	Free	659k reviews Mostly Positive	Free to PlayOpen World +6
Garry's Mod 2006	Est. copies ≈ 64.9M–105.4M SteamSpy 20M–50M	Est. revenue $178.2M–$479.2M net $324.0M–$737.2M gross	$9.99	1.2M reviews Overwhelmingly Positive	SandboxModdable +6
Rust 2018	Est. copies ≈ 41.9M–68.1M SteamSpy 20M–50M	Est. revenue $460.8M–$1239.1M net $837.9M–$1906.2M gross	$39.99	1.4M reviews Very Positive	SurvivalCrafting +6
War Thunder 2013	Est. copies ≈ 39.8M–64.6M SteamSpy 20M–50M	Est. revenue Free	Free	765k reviews Mostly Positive	Free to PlaySimulation +6